/*
 * Copyright (c) 2025 GuoKaiHong (Shenzhen) Technology Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */


export default function deepFreeze(obj) {

  // 取出所有属性
  let propNames = Object.getOwnPropertyNames(obj);
  // 在冻结自身之前冻结属性值
  propNames.forEach(function (name) {
    var prop = obj[name];
    // 如果prop是个对象，冻结它
    if (typeof prop == 'object' && prop !== null) {
      deepFreeze(prop);
    }
  });

  // 冻结自身(no-op if already frozen)
  return Object.freeze(obj);
}